Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada
The distribution of segregated ice and soluble ions in near-surface permafrost were investigated in hummocky terrain near Inuvik, Northwest Territories. Soil water content profiles from analyses of drill cores indicate that ice-poor permafrost developed beneath a permafrost table aggrading at approx...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://ir.library.carleton.ca/pub/2019 https://doi.org/10.1002/ppp.458 |
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ftcarletonunivir:oai:carleton.ca:2019 2023-05-15T16:36:35+02:00 Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada Kokelj, S.V. (S. V.) Burn, C. (Christopher R.) 2003-07-01 https://ir.library.carleton.ca/pub/2019 https://doi.org/10.1002/ppp.458 en eng https://ir.library.carleton.ca/pub/2019 doi:10.1002/ppp.458 Permafrost and Periglacial Processes vol. 14 no. 3, pp. 275-289 Aggradational ice Earth hummocks Permafrost Thaw uncomformity info:eu-repo/semantics/article 2003 ftcarletonunivir https://doi.org/10.1002/ppp.458 2022-02-06T21:51:57Z The distribution of segregated ice and soluble ions in near-surface permafrost were investigated in hummocky terrain near Inuvik, Northwest Territories. Soil water content profiles from analyses of drill cores indicate that ice-poor permafrost developed beneath a permafrost table aggrading at approximately 4 cm/a, but an ice-rich zone, 10 to 20 cm thick, was observed beneath a permafrost table that had remained stable for about a decade. Ice-rich intervals 10 to 30 cm thick were observed immediately beneath both a thaw unconformity formed in 1981 and an older, deeper unconformity. In profile, the correspondence between zones of cation and ice enrichment suggests soluble materials were incorporated into permafrost during development of near-surface aggradational ice. Moisture enrichment below an experimentally degrading permafrost table was negligible. Similar ice contents beneath the present permafrost table and the deep thaw unconformity, and the preservation of ice-poor intervals immediately above the 1981 and deep thaw unconformities indicate limited vertical ice enrichment. The estimated rates of ice accumulation in two-decade-old permafrost are on the order of mm/a, but ice accumulation above older unconformities indicates that, in aggregate, these initial rates decrease with time. The ground ice and soluble cations sequestered in near-surface permafrost comprise an important pool of water and nutrients that may be released into the active layer during periods of deeper thaw. Copyright Article in Journal/Newspaper Ice Inuvik Northwest Territories permafrost Permafrost and Periglacial Processes Carleton University's Institutional Repository Canada Inuvik ENVELOPE(-133.610,-133.610,68.341,68.341) Northwest Territories Permafrost and Periglacial Processes 14 3 275 289 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
Aggradational ice Earth hummocks Permafrost Thaw uncomformity |
spellingShingle |
Aggradational ice Earth hummocks Permafrost Thaw uncomformity Kokelj, S.V. (S. V.) Burn, C. (Christopher R.) Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada |
topic_facet |
Aggradational ice Earth hummocks Permafrost Thaw uncomformity |
description |
The distribution of segregated ice and soluble ions in near-surface permafrost were investigated in hummocky terrain near Inuvik, Northwest Territories. Soil water content profiles from analyses of drill cores indicate that ice-poor permafrost developed beneath a permafrost table aggrading at approximately 4 cm/a, but an ice-rich zone, 10 to 20 cm thick, was observed beneath a permafrost table that had remained stable for about a decade. Ice-rich intervals 10 to 30 cm thick were observed immediately beneath both a thaw unconformity formed in 1981 and an older, deeper unconformity. In profile, the correspondence between zones of cation and ice enrichment suggests soluble materials were incorporated into permafrost during development of near-surface aggradational ice. Moisture enrichment below an experimentally degrading permafrost table was negligible. Similar ice contents beneath the present permafrost table and the deep thaw unconformity, and the preservation of ice-poor intervals immediately above the 1981 and deep thaw unconformities indicate limited vertical ice enrichment. The estimated rates of ice accumulation in two-decade-old permafrost are on the order of mm/a, but ice accumulation above older unconformities indicates that, in aggregate, these initial rates decrease with time. The ground ice and soluble cations sequestered in near-surface permafrost comprise an important pool of water and nutrients that may be released into the active layer during periods of deeper thaw. Copyright |
format |
Article in Journal/Newspaper |
author |
Kokelj, S.V. (S. V.) Burn, C. (Christopher R.) |
author_facet |
Kokelj, S.V. (S. V.) Burn, C. (Christopher R.) |
author_sort |
Kokelj, S.V. (S. V.) |
title |
Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada |
title_short |
Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada |
title_full |
Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada |
title_fullStr |
Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada |
title_full_unstemmed |
Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada |
title_sort |
ground ice and soluble cations in near-surface permafrost, inuvik, northwest territories, canada |
publishDate |
2003 |
url |
https://ir.library.carleton.ca/pub/2019 https://doi.org/10.1002/ppp.458 |
long_lat |
ENVELOPE(-133.610,-133.610,68.341,68.341) |
geographic |
Canada Inuvik Northwest Territories |
geographic_facet |
Canada Inuvik Northwest Territories |
genre |
Ice Inuvik Northwest Territories permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice Inuvik Northwest Territories permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes vol. 14 no. 3, pp. 275-289 |
op_relation |
https://ir.library.carleton.ca/pub/2019 doi:10.1002/ppp.458 |
op_doi |
https://doi.org/10.1002/ppp.458 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
14 |
container_issue |
3 |
container_start_page |
275 |
op_container_end_page |
289 |
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1766026925359235072 |